[  523.298695] netdevsim netdevsim646 eni646np1: renamed from eth1
[  523.395952] netdevsim netdevsim504 eni504np1: renamed from eth0
[  523.640946] Could not find device with ifindex 2000 in netnsfd 11
[  523.641127] Could not find netns with fd: 2000
[  523.641205] Cannot link a netdevsim to itself
[  523.641297] Format for linking two devices is "netnsfd_a:ifidx_a netnsfd_b:ifidx_b" (int uint int uint).